//JS禁止查看网页源代码的简单实现方法
	window.onload = function(){
		//屏蔽键盘事件
		document.onkeydown = function (){
			var e = window.event || arguments[0];
			//F12
			if(e.keyCode == 123){
				return false;
			//Ctrl+Shift+I
			}else if((e.ctrlKey) && (e.shiftKey) && (e.keyCode == 73)){
				return false;
			//Shift+F10
			}else if((e.shiftKey) && (e.keyCode == 121)){
				return false;
			//Ctrl+U
			}else if((e.ctrlKey) && (e.keyCode == 85)){
				return false;
			//Shift+S	
			}else if((e.ctrlKey) && (e.keyCode == 83)){
				return false;
			}
		};
		//屏蔽鼠标右键
		document.oncontextmenu = function (){
			return false;
		}
	}
